How to Stop Your Laptop from Overheating and Running Slow

Why Is Your Laptop Running Hot?

When your laptop feels like a hot plate and sounds like a jet engine, it is suffering from thermal throttling. To protect its delicate internal components from permanent damage, your computer automatically slows down its processor. This results in lagging, freezing, and sudden shutdowns. Fortunately, you can dramatically lower your laptop's temperature and restore its speed with a few simple physical and digital adjustments.

Step 1: Clear the Dust and Vents (The 5-Minute Physical Clean)

Dust is the number one enemy of laptop cooling systems. Over time, it forms a thick blanket over your fans and heatsinks, trapping heat inside the chassis.

• Locate the vents: Find the intake and exhaust vents on your laptop (usually located on the bottom or the back hinges).
• Use compressed air: Turn off your laptop and unplug it. Hold a can of compressed air upright and blast short bursts into the vents. Pro tip: Insert a toothpick gently into the fan grille to prevent the fan blades from spinning too fast and damaging the bearing while you spray.
• Avoid soft surfaces: Never use your laptop on a bed, couch, or blanket. These soft surfaces block the bottom intake vents, causing heat to build up instantly. Always use a hard, flat surface.

Step 2: Elevate Your Laptop for Better Airflow

Giving your laptop a little breathing room underneath can drop its temperature by 5 to 10 degrees instantly.

• Use a laptop stand: An angled mesh stand allows maximum passive airflow around the chassis.
• The DIY bottle cap trick: If you do not have a stand, place two identical plastic bottle caps or small rubber pads under the rear rubber feet of your laptop. This elevates the intake vents just enough to drastically improve airflow.

Step 3: Kill Resource-Hogging Background Software

Heavy software forces your CPU to work harder, generating massive amounts of heat. You need to close unnecessary background tasks.

• On Windows: Press Ctrl + Shift + Esc to open the Task Manager. Click the "CPU" column header to sort by usage. Select any high-percentage apps you are not using and click "End Task".
• On Mac: Press Cmd + Space, type "Activity Monitor", and press Enter. Under the "CPU" tab, click the "% CPU" column. Select unnecessary apps and click the "X" button in the top-left corner to quit them.

Step 4: Adjust Your OS Power Settings

You can limit how hard your processor is allowed to run, reducing heat generation without a noticeable loss in everyday performance.

• On Windows: Go to Control Panel > Power Options > Change plan settings > Change advanced power settings. Expand "Processor power management" and set the "Maximum processor state" to 99% instead of 100%. This prevents the CPU from entering "Turbo Boost" mode, which creates excessive heat.
• On Mac: Go to System Settings > Battery, and enable "Low Power Mode". This optimizes energy usage to keep your laptop running cool and quiet.

Step 5: Change Your Thermal Paste (Advanced)

If your laptop is more than 3 years old and still overheating after steps 1 through 4, the factory thermal paste—the compound that transfers heat from the CPU to the heatsink—has likely dried up. Buying a cheap tube of high-quality thermal paste and reapplying it to the CPU can drop temperatures by up to 20°C. Search for a teardown video of your specific laptop model on YouTube to see if this is a DIY task you feel comfortable tackling.